/*
 * Copyright Red Hat Inc. and/or its affiliates and other contributors
 * as indicated by the authors tag. All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License version 2.
 * 
 * This particular file is subject to the "Classpath" exception as provided in the 
 * LICENSE file that accompanied this code.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT A
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License,
 * along with this distribution; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301, USA.
 */
@noanno
shared interface Bug1777<Element> satisfies Iterable<Element> {
    shared default Result foldd<Result>(Result initial)
           ("The accumulating function that accepts an
             intermediate result, and the next element."
            Result accumulating(Result partial, Element element)) {
        variable value partial = initial;
        for (elem in this) {
            partial = accumulating(partial, elem);
        }
        return partial;
    }

    shared formal Result foldFormal<Result>(Result initial)
    ("The accumulating function that accepts an
             intermediate result, and the next element."
        Result accumulating(Result partial, Element element));
}

@noanno
shared abstract class Bug1777_Impl<Element>() satisfies Bug1777<Element> {
    // make sure we forward to the default method correctly
}

@noanno
shared abstract class Bug1777_2<Element>() satisfies Iterable<Element> {
    shared default Result foldd<Result>(Result initial)
    ("The accumulating function that accepts an
             intermediate result, and the next element."
    Result accumulating(Result partial, Element element)) {
        variable value partial = initial;
        for (elem in this) {
            partial = accumulating(partial, elem);
        }
        return partial;
    }
}
